Design and development of microprocessor based quantitative impedance system for pulmonary oedema

Transthoracic Electrical Impedance (TEI) has been used for detecting pulmonary oedema for quite some times. However the noninvasive technique could only be successfully used on a quantitative or semi-quantitative basis if control TEI (patient's normal disease free TEI) is available. A microprocessor based system has been developed which can predict control transthoracic electrical impedance. This can quickly detect semi-quantitatively whether a patient with heart disease or a Jawan being air lifted to high altitude (more than 3000 m) is developing or has developed pulmonary oedema and to monitor the effect of therapy. The system should be of immense additional help for the bedside noninvasive monitoring of cardiac patients and early detection of pulmonary complications.